Ding Chen, Xue Kaixi, Yi Guangsheng
College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, Guangdong, China.
School of Civil and Architecture Engineering, East China University of Technology, Nanchang, Jiangxi, China.
Sci Rep. 2023 Oct 12;13(1):17288. doi: 10.1038/s41598-023-44591-9.
The construction sector has become the most critical source of carbon emissions, but the existing thermal insulation materials such as thermal insulation mortar have obvious limitations, so it is urgent to develop building thermal insulation materials with superior performance and low cost. Aiming at the problem of poor bond strength of foam thermal insulation mortar, this research team selected basalt fiber as admixture to verify the influence of basalt fiber content on its performance and the economic feasibility of thermal insulation mortar. The main finding is that basalt fiber as an additive can obviously improve the crack resistance of thermal insulation mortar. When the content of basalt fiber increases from 0 to 2.5%, the compressive strength of mortar increases at first and then decreases, and the bond strength increases nonlinearly, but the thermal conductivity and dry density also increase. Therefore, the optimal content of basalt fiber is 1.5%. The improvement effect of fire resistance of thermal insulation mortar with 1.5% basalt fiber content is better. After curing for 28 days, the mass loss rate of the sample is reduced by about 11.1% after high temperature, and the relative compressive strength is increased by about 9.71% after high temperature. The raw material cost of the new fireproof thermal insulation mortar improved by basalt fiber is lower, and the cost of the finished product is reduced by 16.98%, 28.18%, 33.05% and 38.96%, respectively, compared with the four types of thermal insulation mortar already used in the market. More importantly, the economic recovery period of the new fireproof and thermal insulation mortar is undoubtedly shorter than that of alternative thermal insulation or energy storage materials, which not only achieves low emission and environmental protection, but also satisfies the economic feasibility.
建筑行业已成为碳排放的最关键来源，但现有的保温材料如保温砂浆存在明显局限性，因此迫切需要开发高性能、低成本的建筑保温材料。针对泡沫保温砂浆粘结强度差的问题，该研究团队选择玄武岩纤维作为掺合料，以验证玄武岩纤维含量对其性能的影响以及保温砂浆的经济可行性。主要研究结果是，玄武岩纤维作为添加剂可显著提高保温砂浆的抗裂性。当玄武岩纤维含量从0增加到2.5%时，砂浆的抗压强度先增加后降低，粘结强度呈非线性增加，但导热系数和干密度也增加。因此，玄武岩纤维的最佳含量为1.5%。玄武岩纤维含量为1.5%的保温砂浆的耐火性改善效果更好。养护28天后，高温后样品的质量损失率降低约11.1%，高温后相对抗压强度提高约9.71%。玄武岩纤维改良后的新型防火保温砂浆的原材料成本较低，与市场上已使用的四种保温砂浆相比，成品成本分别降低了16.98%、28.18%、33.05%和38.96%。更重要的是，新型防火保温砂浆的经济回收期无疑比替代保温或储能材料的回收期短，这不仅实现了低排放和环保，还满足了经济可行性。
